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Impact of the mites Dermanyssus gallinae and Tyrophagus putrescentiae on production and health of laying hens

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Abstract

Mites are considered a threat to the commercial poultry industry due to their direct and indirect pathogenic effects. Dermanyssus gallinae is among the mite species that endanger production, as it is hematophagous and poses a serious sanitary risk. Recently, Tyrophagus putrescentiae has also drawn attention as a potential pest in the poultry industry, and its attacks have been related to clinical symptoms such as cutaneous eruptions and bird restlessness. Considering the potential economic, sanitary, and productive losses both species represent to the laying-hen industry, the aim of the present study was to evaluate the influence of D. gallinae and T. putrescentiae on the health and productivity of commercial laying hens by carrying out infestation experiments and by monitoring laying hens for a period of 60 days. Tyrophagus putrescentiae and D. gallinae affected egg quality and zootechnical parameters in laying hens. Hens infested by T. putrescentiae had behavioral changes, weight loss, stress symptoms, and decreased egg laying and quality, as well as diarrhea, gradual feather loss, and itching. Hens infested by D. gallinae also had weight loss, behavioral changes, and stress symptoms, leading to decreased laying and egg quality. The present study proposes an experimental model to understand the impacts caused by T. putrescentiae and D. gallinae on commercial laying production and egg quality parameters.

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Acknowledgements

The authors are grateful to Universidade do Vale do Taquari - Univates and Naturovos for their financial support and for providing the material required to conduct this study.

Funding

This work was supported by the Naturovos and TECNOVATES, grant number 35/TECNOVATES (Universidade do Vale do Taquari – Univates).

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Contributions

AS, LJ and GLS designed the study; AS, CG, VDM, LMO and FRS performed research, conducted experiments; AS, LJ, and GLS contributed to diagnosis and writing; AS, LJ and GLS drafted the paper with contributions from all other authors. All authors read and approved the final manuscript.

Corresponding author

Correspondence to Angélica Sulzbach.

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The authors declare no competing interests.

Ethical approval

The study was approved by the Research Ethics Committee of Universidade do Vale do Taquari – Univates (protocol number 20, October 16, 2020). All applicable international, national, and/or institutional guidelines for the care and use of animals have been followed.

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Sulzbach, A., Gedoz, C., Quadri, V.D. et al. Impact of the mites Dermanyssus gallinae and Tyrophagus putrescentiae on production and health of laying hens. Exp Appl Acarol 92, 61–85 (2024). https://doi.org/10.1007/s10493-023-00869-1

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  • DOI: https://doi.org/10.1007/s10493-023-00869-1

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